Heaven and earth robbery, the most classic defensive map, can be used in one direction, and the level is so low that it is difficult. However, you can't get through without looking at the raiders. Be sure to watch the raiders and videos of the U9 Heaven and Earth Robbery Zone to create a commemorative edition. The second lowest difficulty is the hero group. Of course, other versions are difficult and easy, and the commemorative version is almost the third to fourth most difficult version, which is very interesting.